If you've seen my bad bike crash here: http://www.youtube.com/watch?v=xe_HGcF-olk this is the corner minutes after the crash, showing lots of visible moisture. (I took the video on purpose before leaving.) I guess it's not a big surprise that the crash occurred then.
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https://www.youtube.com/watch?v=jOmapz5Mqak
- dark blue bar (to right of mark) = energy reserve
- left/right swinging blue/red bar = current exertion
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https://www.youtube.com/watch?v=KdlGFS44kj8